Core box



l 9, 1930. P F DEVANY 1,784,225

CORE BOX Filed April 4*. 1929 Patented Dec. 9, 1930 Y vUNITED STATESPATENT vOFFICE. Y

PATRICK ii. DEVANY, or CHICAGO, ILLINOIS l conn :BX

Applcationiled April 4, 1929. i SerialNo. 352,378.,

The present invention relates to core boxes, leferring to the drawings,l0 indicates the and is particularly concerned With the procore `box inits entirety and the box may convision of an adjustable and permanentcore sist of a 4supporting member or mold il box capable'of meeting-thenormal needs for forniedfof castmetal and having an interior 5 cores formany different purposes. surface l2 of substantially the shape of the soIt is common practice in preparing cores cores to be formed bythe box.In the present for casting operations, to make a new core embodiment,the coresivill be substantially box for every size of core as the needarises cylindrical, being formed by a pair of semifor cores of varioussizes, and the labor ncylindrical members cemented together, and

19 volvod n'construotinga new Core box is of lconsequently the surfacei2 is an internal coursean additional factor in the rfinal costcylindrical surface. It should be understood, of theiinished casting.Vhere a shopk is einhowever, that theprinciple of the invention vployedincastingmanyand varied articles reis applicable as Well to cores ofdifferent p quil-ing coresof differentsizes, the conven- Shapes. o

Vtional coreboxesmust inevitablybe disCLICl- The Supporting member 11'of the Q01-e 1.5 ed When jthe shop begins the manufacture box may beprovided with an external sur- Vof new articles, in order toavoidftheuse of face 1,3` of any convenient shape, and the valuable manufacturing4space for the Stor'- nieinber'll is preferably formed with inage ofsuch articles. tegral legs 14: and l5 projecting at substan- 20' vOneofthe ob'ects of theinvention iis the tially right angles to the bodyportion ll of T0 provision-of a'core boxcapable ofadjustment thesupporting member, adjacent each end. to'providecores ofa multiplicityof dierent VThe .legs .le and l5 may be provided Vwith sizes capable ofmeeting thenormal needs of three supporting surfaces 1S, l? and 18 in.

or shop cestino'. n order to increase the stability` of the core box,

o Another obJect` is the provision of a core the leg lbeiugsubstantially triangular iii 'lo -box provided With a multiplicity ofcoiice'n shape and the leg ll rectangular in shape tric sleeves capableof supporting each other with a cut-out portion 19. to provide a firmstructure for molding cores The supporting member of base mold ll of anydesired size,'said sleeves being providis preferably open at eachV endand provided 39 ed With fastening means for Securing them withfiat-.cover plates 2O and 2l adapted to se in concentric position. besecured to each end to complete the base Other objects and advimtagesofthe invenmold l1 and the cover plates may be secured tion will beapparent ffronrthe `following dein position by a plurality of bolts 22having v scription and from -the accompanying d iaW- thumb pieces'forconvenient removal ofv at ings, in Which similar characters ofreferleast one of the end plates. The end plates i ence indicate similaro* parts throughoutnthe 20, 2i are substantially semi-circular in fseveral views. i v Y shape, theiexternal edges 23 of the end platesReferring O the-Single Sllet Of Cll'-WllgS; conforming to the externalshape or surface Fig l is a vieW- in perspective of a core 13 ofthe basemold ll. Thus,where the Wall 40 box constructed according to the presentinofthe base mold ll is thickened as at Q4 to vention; Y provideadditional material for forming a `FigjQlfisfa vertical, sectional Viewtaken on threaded bore for receiving the screw bolts A.the line .2f-2.of Fig. l; 22, the end plates 2O and 2l Amay also be Fig is aperspective view of one of the formed With their edges 23alignedIvith'tlie 54concentric sleeves of which the core box is Wall. f y

constructed; v .y AThe base mold ll is adapted to serveas a iFig. 4l isavertical, sectional view on an encore box for cores of the largest sizedesired, rlarged scale, taken on the plane of the line and in order toprovide a .core box adapted to 44-4 ofFigQ, looking in the'-directionofthe form cores of a multiplicity of sizes, the base y f Y memberll isprovided With a series of conis@ centric members 26, each having innerand router surfaces which are complementary to i the adjacent members26.

Cil

y to fasten the sheet metal .members26 in the j Referring to Fig. 3, oneof the removable core box members 26 is here shown in perspective, andthe removable member 26 may consist of a strip of sheet metal ofrelatively thin gauge curved laterally to substantially the shape ofasemi-cylinder, and provided at each end With an aperture 27 countersunkat 28 to receive the head 29 of a screw bolt 30.

The core member 31 immediately adjacent the.

closely within the inner surface 12 of the base member 1l, Withits upperedge 32 flush with the flat upper edge 33 of the base member 11.. In asimilar manner, the removable core member or sleeve 34 is adapted to litin the removable member 31 and the sheet metal members 26 thusconstitute a series of removable mexnbers which may be used to form acore box of cylindrical shapeiand of a multiplicity of convenientqsizes,the number of sizes being limited only by the, practical thickness ofsheet metal required for forming the ymembers 26. i K f Each of thesheet metal members 26 is preferably provided with convenient indicia 35located adjacent one or both ends and givf ing the diameter of the sheet`metal member 26 to which it is applied. i

In order to secure the concentric sheet metal members 26 in position, apair of bolts 30 may be passed ythrough theY apertures 27 and through aregistering bore 36 located in the bottom of the base member 11. Thescrew bolts 30 may have their heads formed to be received in thecountersunk apertures 27 or the bolts may be provided with relativelythin vheads so as to form substantially no projection inside the corebox.

fing nuts 37 are Vprovided for engaging threads 38 on screw bolts 3()and the threads 38 cover substantially thefentire length 'of v basemember l1 even when but one or two sheet metal members 2G are employed.

iUnder such conditions,ithe legs 14 and perform the additional functionof supportl from one end and the wingnuts 37 removed to release thebolts 30. vA sufficient number of the sheet metal members 26'may beretional labor is required in The core box mold member 26 which isemployed, is in turn firmly supported by each of the seres'of concentricsheet metal members beneath it, which is supported by the base member11, the ends of the core box being also adapted to bind against the endsof the sheet metal members 26 to secure the same iu proper position. Thecores may be molded 1n semi-cylindricalA form for the entire length ofthe box or a part of the coi'ebox may be filled up with other materialso as to form cores of shorter lengths, and the semi-cyliiulrical coresrare cemented together in the usual manner.

It Willthus be observed that the present core box is adapted to formcoresof a multi- Aplicity of convenient sizes, and since the smoothsurfaces than cores Whichfare formed e Furin coreboXes constructed oflumber.

thermore, the present device is capable of withstanding greaterpressures, and it ocycupiesfbut a small portion of the space re- -quiredby the large number ofY different core boxes which would be capable ofperforming the same result and substantially no addiproviding cores ofdifferent sizes. f l

While I have illustrated a preferred embodiment of my invention, manymodifica- -tions may be made Without departing from theV spirit of theinvention, and I do not wish to be limited to the precise details ofconstruction set forth, but desire to avail myself of all changes withinthe scope ofthe appended claims. y

Having thus'described my invention, what I claim is newand desire tosecure'by Letters Patent of the United States, is:

l. A core box comprising a cast metal base member having an innerv coreInolding surface, a multiplicity of sheet metal members,

" each having an inner core molding surface,

and each having van outer surface eornple' Vmenta'ryto'the core moldingsurfacey of the adjacent sheet metal member, the outer edges f of all ofsaid sheet metal members terminatf ing substantially flush with theupper edge of the core box, members adapted to be secured to said basemember and to form end walls vfor a mold provided by any of lsaid sheetmetal members, and' means for securing said sheet metal members inposition, comprising a threaded member passing through said sheet metalmembers and said base members,

said base member being provided with legs lfor supporting said core boxand bolts in spaced relation to a supporting member'in any adj ustedposition of said bolts. y

2. In an adjustable core box, the combination of a cast metal memberhaving open ends and having a substantially semi-cylindrical innersurface with a' series of sheet metal members, each curved laterally tosubstantially semi-cylindrical form and each of substantially the samelength as said cast metal member, said sheet metal members beingarranged in a. series of members adapted to be received Within eachother and to support each otherto form a core box of a multiplicity ofditerent sizes, and plates for engaging the ends of said sheet metalmembers and the ends of said cast metal member, means for securing saidend plates in position, said sheet metal members and cast metal membersbeing provided with registering apertures and a threaded member passingthrough said registering apertures for securing said sheet netal membersin said core box, said core box being provided With integral legs formedadjacent each end of said core box.

3. An adjustable core box comprising a metal casing having a pluralityof legs and having a substantially semi-cylindrical molding surface,separable end Walls for closing each end of said core box, a pluralityof substantially semi-cylindrical sheet metal members adapted to nestinside each other and inside said casing, and means for securing anynumber of said sheet metal members in horizontal nesting relation withsaid casing to form a semi-cylindrical molding surface.

4. An adjustable core box comprising a metal casing having a pluralityof legs and having a substantially semi-cylindrical molding surface,separable end Walls for closing each end of said core box, a pluralityof substantially semi-cylindrical sheet metal members adapted to nestinside each other and inside said casing, means for securing any numberof said sheet metal members in iorizontal nesting relation with saidcasing to 'form a semi-cylindrical molding surface, said metal memberseach having counter sunk apertures, and said means comprising a threadedmember passing through said sheet metal members and casing, and havingits head imbedded in the counter sunk portion of the uppermost sheetmetal member.

In witness whereof, I hereunto subscribe my name this 1st day of April,1929.

PATRICK F. DEVANY.

